Update tests error messages to be compatible with voluptuous 0.14.0

The commit

alecthomas/voluptuous@41bc53d

which was introduced in version 0.14.0 of voluptuous library,
improves the error messages for invalid keys. To make Gnocchi
tests compatible with this new version, we need to update some
error messages validation to use the newest error messages from
voluptuous parser.

(cherry picked from commit 3741cc8)

gnocchi/tests/functional/gabbits/search.yaml

@@ -53,7 +53,7 @@ tests:
       status: 400
       response_json_paths:
         $.description.cause: "Invalid input"
-        $.description.reason: "/^extra keys not allowed @ data/"
+        $.description.reason: "value must not be one of ['id'] @ data['like']['id']"
         $.description.detail: ["like", "id"]
 
     - name: search like list id
@@ -67,7 +67,7 @@ tests:
       status: 400
       response_json_paths:
         $.description.cause: "Invalid input"
-        $.description.reason: "/^extra keys not allowed @ data/"
+        $.description.reason: "value must not be one of ['id'] @ data['like']['id']"
         $.description.detail: ["like", "id"]
 
     - name: search invalid ne value

gnocchi/tests/test_rest.py

@@ -1882,7 +1882,7 @@ def test_search_resources_invalid_query(self):
         result_description = result.json['description']
         self.assertEqual("Invalid input", result_description['cause'])
         self.assertIn(
-            "extra keys not allowed @ data[", result_description['reason']
+            "not a valid value @ data['wrongoperator']", result_description['reason']
         )